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Nonlinear photoassociation through exotic orbits.

M D Forlevesi¹, R Egydio de Carvalho¹, Emanuel F de Lima²

¹Universidade Estadual Paulista-UNESP, Instituto de Geociências e Ciências Exatas-IGCE, Departamento de Estatística, Matemática Aplicada e Ciências da Computação, Rio Claro-SP 13506-900, Brazil.

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|August 20, 2021

Summary

This summary is machine-generated.

Exotic orbits facilitate intermittent photoassociation by connecting unbound and bound molecular states through chaotic regions. This phenomenon, observed in MgLi and SrLi, allows metastable molecule formation.

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Area of Science:

Atomic and Molecular Physics
Chemical Physics
Quantum Optics

Background:

Classical molecular photoassociation involves interactions between atomic collisions and laser fields.
Standard models describe bound states as librational motion and unbound states as unbound motion, with energy as a conserved quantity.
External perturbations can introduce chaotic orbits, allowing transitions between bound and unbound states.

Purpose of the Study:

To investigate the role of exotic orbits in classical molecular photoassociation.
To understand the mechanism of intermittent photoassociation.
To identify conditions favoring the emergence of exotic orbits.

Main Methods:

Utilized a Morse potential model with time-dependent perturbation simulating laser-molecule interaction.
Analyzed classical dynamics, including chaotic and exotic orbits, connecting unbound and bound states.
Applied realistic potential and dipole functions for MgLi and SrLi molecules to validate findings.

Main Results:

Identified exotic orbits, characterized by libration-like, chaotic, and unbound segments, as a pathway between molecular states.
Demonstrated that exotic orbits lead to intermittent photoassociation, forming metastable molecules.
Found that the short range of dipole interaction relative to potential range is crucial for exotic orbit formation.

Conclusions:

Exotic orbits provide a novel mechanism for molecular photoassociation, distinct from purely chaotic or direct transitions.
Intermittent photoassociation is a consequence of exotic orbits, enabling the formation of metastable molecules.
The study confirms the existence of exotic orbits and intermittent photoassociation in realistic molecular systems like MgLi and SrLi.